Picker-staff check for looms



R. N. REYNOLDS AND B. D. BALLEW.

PICKER STAFF CHECK FOR LOOMS.

APPLICATION FILED DEC,13, 1920.

1 $85,924:, Patented July 26, 1921.

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UNITED STATES PATENT OFFICE.

ROGER N. REYNOLDS, F ATLANTA, GEORGIA, AND BENJAMIN I). BALLEW, OF GREEN- VILLE, SOUTH CAROLINA; SAID BALLEW ASSIGNOR OF ONE-HALF OF HIS RIGHT TO SIDNEY BAXTER, OF ATLANTA, GEORGIA.

PICKER-STAFE CHECK FOR LOOMS.

Specification of Letters Patent.

Patented July 26, 1921.

- Application filed December 13, 1920. Serial No. 430,381.

To all whom it may concern-.-

Be it known that we, Roerin L RnYNoLos and BENJAMIN D. BALLEW, citizens of the United States, residing, respectively,at Atlanta and Greenville, in the counties of Fulton and Greenville and States of Georgia and South Carolina, have invented certain new and useful Improvements in Picker- Staff Checks for Looms; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Thepresent invention relates to improvements in picker staff checks for looms, and has for an object to provide an improved checking mechanism which will take care of the tendency of the picker staff to rebound at opposite ends of its movement.

This tendency of the staff to rebound allows it to come to rest at a point where it will not be enabled to move through its full stroke and to correspondingly effectively throw the shuttle across the race.

It is an object of the invention to provide an improved stop mechanism that will bring the picker staff to rest effectively yet slowly and which will avoid the objectionable rebounding with its attendant disadvantages.

Another object of the invention lies in providing an improved stop mechanism which is simple and inexpensive in construction and which is capable of being attached to present forms of looms without any alterations therein.

lVith the foregoing and other objects in view, the invention will be more fully described hereinafter, and will be more particularly pointed out in the claims appended hereto.

In the drawings wherein like symbols refer to like or corresponding parts throughout the several views,

Figure 1 is a view in elevation of portions of a loom showing the picker staff, shuttle and the improved stop mechanism constructed according to the present invention;

Fig. 2 is an enlarged fragmentary sec tional view taken on the line 22 in Fig. 1;

Fig. 3 is an enlarged edge view of the im proved stop mechanism; and

Fig. 4 is a fragmentary plan view of the same.

Referring more particularly to the drawings, l designates the usual picker staff which is adapted to oscillate back and forth and to throw the shuttle 2 across the race. A portion of the lay structureis indicated at which forms a convenient support to which to attach the improved stop mechanlsm. r Thisstop mechanism comprises a plate-l having a reduced upper portion 5 adapted to be placed againstthe lay structure3 and to be secured thereto as by screws or other fastenings 6. The lower portion of the plate is provided with flanges 7 and 8 extending outwardly at right angles to the body of the plate and having secured therebetween at suitably spaced apart distances a pair of guide rods 9 and 10, the ends of which may be riveted or upset against the exterior faces of the flanges 7 and 8. The guide rods 9 and 10 are. spaced from the adjacent face of the plate. 4. j

Buffer arms 11 and-12 are slidable in the flanges 7 and S and are provided with U-shaped ends 13 and 14 extending in the .path of the picker staff 1 and adapted to be encountered thereby as the staff approaches the opposite limits of its movement. Guide pieces 15 and 16 are secured as by fastenings l7 and 18 to the buffer arms 11 and 12 respectively and extend in opposite directions being perforated to slide on the guide'rods 9 and 10. r e

A coil springl9 is wound about the guide rod 10 between the flange 7 and the guide piece 16 and normally urges the guide. piece 16 together with. its buffer arm 12 toward the right. The guide piece 16 carries a perforated lug ,20 extending toward, the companion buffer arm 11 and slidingly receives therethrough a pin 21 which is screwed into, or otherwist secured to, a wedge block 22 also carried by the buffer arm 11. A coil spring 23 is wound about the pin 21 between the wedge block 22 and the lug and normally tends to separate the wedge block 22 and the guide piece 16. A companion wedge block 24 is fixedly mounted upon the buffer arm 12, the two wedge blocks having adjacent inclined faces cooperating as hereinafter explained.

In use, the picker staff 1 oscillates back and forth driving the shuttle 2 across the racein the usual manner. In Fig. 1 it is shown at one end of its movement where sliding in the flanges? and 8 of the plate 4, will bring the picker staff 1 to rest slowly and effectively and will prevent its rebound by the actionof the wedge blocks 22 and 24:. For instance, when the picker staff 1 swings toward the left and strikes the end 13 of the buffer arm 12 it shifts this arm toward the left. This causes compression of the springs 19 and 28' and the. latter tending to expand will cause theshifting of the wedge block 22 and the opposite buffer arm 11 in the same direction to the left. In other words, the wedge block22 will yieldably follow the wedge block 24 so that when the force of the blow resulting from the picker staff striking the buffer arm 12 is spent, the buffer arm 12 will be allowed but a very limited rebound as the'inclined-face of the wedge 22 will almost immediately encounter the inclined face ofthe wedge block 24 and thus frictionally and yieldably arrest any backward morement of said buffer arm 12. I

A like action will be hadwhen. the picker staff 1 swings to the opposite or'right hand position where it will encounter the U- shaped end 14 of the companion buffer arm 11. Here the spring 23 will be compressed by the movementof the wedge block 22 toward the right and will act upon the lug 2and guide piece 16 causing the other bulfer arm 12 and its wedge block 2%. to be yieldingly moved toward the right with a like result. 1

It is obviousthat various changes and modifications may be made in the details of construction and design 'ofthe above specifically described embodiment-10f this invention without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claims.

What is claimed is "1. Ina loom, a stop mechanism comprising buffer means movable in opposite direcing a plate adapted means and arranged in the path of the picker stall, and wedge blocks carried by said buffer arms and adapted to come together to prevent the rebound of the arms, substantially as described. v

8. In a loom, a stop mechanism comprising a supporting means, oppositely moving buffer arms slidably carried by said supporting means, a pair of blocks having oppositely inclined faces carried by said arms, and spring means adapted to cause one block to follow the other as thebu'lfer arms are moved, substantiallyvas described, a

4:. In a loom, astop mechanism comprising a plate havingflanges, buffer arms slidably mounted in said flanges, guide rods extending between said flanges, guide pieces on said arms sliding on said rods, friction members carried by said buffer arms, and yieldable means causing one friction'memher to follow the other when said arms are moved, substantially as described.

' 5. In a loom, a stop mechanism comprisfor attachment to the loom and provided with apair of flanges,

guide rods extending between said flanges,

buffer. arms slidably mounted in said flanges and having offset ends, guide pieces attached to said arms and slidable on said rods, a pair of wedge blocks fixedly mounted on said arms, a coil spring extending about one guide rod between one flangeand the guide piece thereon, and a second spring extending between one guide piece and the adjacent wedge block, substantially as described.

ROGER N. REYNOLDS. BENJAMIN D. BALLEVV. 

